the thing most of these crappy articles fail to mention is that this was more of an advertisement of Samsung's smart phones which the company itself did to show how powerful their phones are. they connected 40 Galaxy S5 phones in a structure that only "they can build" and run a code through all of them, and they in fact got some hashrate to mine bitcoin with, nothing efficient though. just an advertisement.
I believe so that this is just an advertisement of their product. Since cryptocurrency is getting the attention then they want to use this opportunity to advertise their products. Though it may be hard for an ordinary person to mine using these smartphones nowadays but there is a possibility that it will be easier in the future seeing the advancement of the technology. There are other coins that can be mine using the smartphone but then some are still complaining that it makes their phone too hot and make the parts to melt so they just stop it. Maybe some companies can find ways to make smartphones be a true mining rig in the future.
I am sure that Samsung is just riding the cryptocurrency bandwagon and wants bigger sales from people who are already into the cryptocurrency thing. Or maybe it can really be use for mining but not for Bitcoin and maybe Samsumg is planning to introduce their own version of cryptocurrency more of a token and anybody can mine them using their phones. Companies right now are looking at many ways to they can exploit the new market provided by the crypto revolution.